01304low severityNetwork
Radio - No Communication
on 1999 Audi A8 4.2L V8 · AWD
What this code means
The radio/infotainment unit is not communicating over the data bus. Similar to OBD U0155 family for lost communication.
Symptoms
- Radio does not turn on
- No audio output
- Display blank or frozen
Common causes
- Blown radio fuse
- Wiring or connector fault
- Faulty radio unit
- CAN bus wiring damage
Diagnostic steps
- Check radio fuse and power supply
- Verify CAN bus wiring to radio
- Scan for other bus faults
- Replace radio if unresponsive
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Network codes on this vehicle
00003
Control Module - Defective
01312
Powertrain Data Bus - Defective
01314
Engine Control Module (ECM) - no communications
01315
Transmission Control Module (TCM) - No Communication
01316
ABS Control Module - No Communication
01317
Instrument Cluster Control Module (J285) - No Communication
01318
Immobilizer Control Module - No Communication
01321
Airbag Control Module - No Communication
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance